Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2013

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment consists of the following:

December 31, (dollars in thousands)	2013		2012
Land	$	21,452	$	20,168
Buildings	89,734		86,498
Machinery and equipment	459,244		449,805
Furniture and fixtures	14,468		13,662
Software	20,490		19,987
Construction in progress	17,064		21,308
Gross property, plant and equipment	622,452		611,428
Less accumulated depreciation	356,790		353,274
Net property, plant and equipment	$	265,662	$	258,154